Building a Better Toronto Together

Green Streets Demonstration Project Lessons Learned So Far

Engineering & Construction Services

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Agenda

• Green Streets Project Background • Site Selection • Procurement • Byng Avenue Project • Thorncrest Village Project • Public Involvement • Lessons Learned • Next Steps

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Project Background • Wet Weather Flow Master Plan • Council Resolution • Green Street Technical Guidelines • General Managers and Executive Directors

direction • Divisional Partnership – TS, TW, ECS • Goal: LID incorporated into all road recon projects

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Demonstration Projects Site Selection

• Include LID in road reconstruction projects

• Required adequate soils for LID

• Preferably areas with existing ditches

• Interested in multiple locations • Two sites in Etobicoke

– Byng Avenue – Thorncrest Village

Engineering Services RFP

• Pre-construction monitoring • Preliminary and detailed

design • Public consultation • Construction services • Post-construction services • Post-construction monitoring • Awarded May 2018

LID Contractor Prequalification

• Pre-qualify LID contractors (sub/general)

• Qualifications; – Record of successful

LID projects; or, – Completed STEP LID

Training; or, – Similar LID Training.

• Three contractors prequalified August 8th, 2018

Schedule • Byng Avenue tender awarded April 2018 • Engineering Services Contract – May 2018 • Contractor pre-qualification – August 2018 • LID Construction planned for September, actual October 2018 • Compressed Design Time, Provisional Amount in Tender • Thorncrest Village – planned for summer 2019

Byng Avenue Site • Scheduled for Reconstruction: complete removal and

replacement of existing road pavement/structure

Byng Design

Byng Bioretention Cells

• Infiltration rates 13.7 to 46.3 mm/hr

• Underdrains • 100% of 5 mm event • 42-100% of 25 mm event • Surface Treatments • Monitoring • Existing catchbasins

Byng Permeable Sidewalk and French Drain

• Permeable Concrete: – 100% of 25 mm event – Underdrain – Temperature Challenges – Neighbourhood Challenges

• French Drain – Solves existing erosion – Ecoraster surface

Byng Avenue Photos - 1

Byng Avenue Photos - 2

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Thorncrest Village

Location 1

Location 2

Location 3 Location 4

• Scheduled for Cold-in-Place Recycling (CIR): reusing existing asphalt pavement

Thorncrest Village – Location 1 Thornbury Crescent

Thorncrest Village – Location 2 Thorncrest Road

Thorncrest Village – Location 3&4 Pheasant lane

Thorncrest Village – Challenges

• Coordination between city projects –Basement Flooding –Local Roads –Green Streets

Demonstration Project

Public Involvement

• Extensive public involvement • Green Streets initiative new to

residents • Thornbury Concerns • Byng Concerns

Lessons Learned So Far • Give your project time • Develop a process • Be adaptable • Revise expectations • Coordinate with other projects • Engage the public

Next Steps • Planning for 2020 • Selecting ideal sites • Building capacity at the City • Development projects

Questions?

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